Zephyr Strike

1st-Level Transmutation
Casting Time: 1 bonus action
Range: Self
Components: V
Duration: (C) 1 minute

As in Xanathar's Guide to Everything with the following addition:
At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the bonus damage increases by 1d8 for every slot level above 1st.

Source: XGE 171